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2025-05-30 14:30:16
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  北京蛇肉火锅 痛风   

CAPE CANAVERAL, Fla. (AP) — Mars is about to get its first U.S. visitor in years: a three-legged, one-armed geologist to dig deep and listen for quakes.NASA's InSight makes its grand entrance through the rose-tinted Martian skies on Monday, after a six-month, 300 million-mile (480 million-kilometer) journey. It will be the first American spacecraft to land since the Curiosity rover in 2012 and the first dedicated to exploring underground.NASA is going with a tried-and-true method to get this mechanical miner to the surface of the red planet. Engine firings will slow its final descent and the spacecraft will plop down on its rigid legs, mimicking the landings of earlier successful missions.That's where old school ends on this billion U.S.-European effort .Once flight controllers in California determine the coast is clear at the landing site — fairly flat and rock free — InSight's 6-foot (1.8-meter) arm will remove the two main science experiments from the lander's deck and place them directly on the Martian surface.No spacecraft has attempted anything like that before.The firsts don't stop there.One experiment will attempt to penetrate 16 feet (5 meters) into Mars, using a self-hammering nail with heat sensors to gauge the planet's internal temperature. That would shatter the out-of-this-world depth record of 8 feet (2 ? meters) drilled by the Apollo moonwalkers nearly a half-century ago for lunar heat measurements.The astronauts also left behind instruments to measure moonquakes. InSight carries the first seismometers to monitor for marsquakes — if they exist. Yet another experiment will calculate Mars' wobble, providing clues about the planet's core.It won't be looking for signs of life, past or present. No life detectors are on board.The spacecraft is like a self-sufficient robot, said lead scientist Bruce Banerdt of NASA's Jet Propulsion Laboratory."It's got its own brain. It's got an arm that can manipulate things around. It can listen with its seismometer. It can feel things with the pressure sensors and the temperature sensors. It pulls its own power out of the sun," he said.By scoping out the insides of Mars, scientists could learn how our neighbor — and other rocky worlds, including the Earth and moon — formed and transformed over billions of years. Mars is much less geologically active than Earth, and so its interior is closer to being in its original state — a tantalizing time capsule.InSight stands to "revolutionize the way we think about the inside of the planet," said NASA's science mission chief, Thomas Zurbuchen.But first, the 800-pound (360-kilogram) vehicle needs to get safely to the Martian surface. This time, there won't be a ball bouncing down with the spacecraft tucked inside, like there were for the Spirit and Opportunity rovers in 2004. And there won't be a sky crane to lower the lander like there was for the six-wheeled Curiosity during its dramatic "seven minutes of terror.""That was crazy," acknowledged InSight's project manager, Tom Hoffman. But he noted, "Any time you're trying to land on Mars, it's crazy, frankly. I don't think there's a sane way to do it."No matter how it's done, getting to Mars and landing there is hard — and unforgiving.Earth's success rate at Mars is a mere 40 percent. That includes planetary flybys dating back to the early 1960s, as well as orbiters and landers.While it's had its share of flops, the U.S. has by far the best track record. No one else has managed to land and operate a spacecraft on Mars. Two years ago, a European lander came in so fast, its descent system askew, that it carved out a crater on impact.This time, NASA is borrowing a page from the 1976 twin Vikings and the 2008 Phoenix, which also were stationary and three-legged."But you never know what Mars is going to do," Hoffman said. "Just because we've done it before doesn't mean we're not nervous and excited about doing it again."Wind gusts could send the spacecraft into a dangerous tumble during descent, or the parachute could get tangled. A dust storm like the one that enveloped Mars this past summer could hamper InSight's ability to generate solar power. A leg could buckle. The arm could jam.The tensest time for flight controllers in Pasadena, California: the six minutes from the time the spacecraft hits Mars' atmosphere and touchdown. They'll have jars of peanuts on hand — a good-luck tradition dating back to 1964's successful Ranger 7 moon mission.InSight will enter Mars' atmosphere at a supersonic 12,300 mph (19,800 kph), relying on its white nylon parachute and a series of engine firings to slow down enough for a soft upright landing on Mars' Elysium Planitia, a sizable equatorial plain.Hoffman hopes it's "like a Walmart parking lot in Kansas."The flatter the better so the lander doesn't tip over, ending the mission, and so the robotic arm can set the science instruments down.InSight — short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport — will rest close to the ground, its top deck barely a yard, or meter, above the surface. Once its twin circular solar panels open, the lander will occupy the space of a large car.If NASA gets lucky, a pair of briefcase-size satellites trailing InSight since their joint May liftoff could provide near-live updates during the lander's descent. There's an eight-minute lag in communications between Earth and Mars.The experimental CubeSats, dubbed WALL-E and EVE from the 2008 animated movie, will zoom past Mars and remain in perpetual orbit around the sun, their technology demonstration complete.If WALL-E and EVE are mute, landing news will come from NASA orbiters at Mars, just not as quickly.The first pictures of the landing site should start flowing shortly after touchdown. It will be at least 10 weeks before the science instruments are deployed. Add another several weeks for the heat probe to bury into Mars.The mission is designed to last one full Martian year, the equivalent of two Earth years.With landing day so close to Thanksgiving, many of the flight controllers will be eating turkey at their desks on the holiday.Hoffman expects his team will wait until Monday to give full and proper thanks.___The Associated Press Health & Science Department receives support from the Howard Hughes Medical Institute's Department of Science Education. The AP is solely responsible for all content. 6433

  北京蛇肉火锅 痛风   

Burger King is serving up the Whopper in a whole new way.On Thursday, the fast-food chain announced that its famous burger would be served with “no colors, flavors, or preservatives from artificial sources.” 215

  北京蛇肉火锅 痛风   

CARLSBAD, Calif. -- The unofficial start to spring in Southern California is about to begin as the beautifully iconic Carlsbad Flower Fields officially open for business Thursday.Visitors will enjoy nearly 50 acres of Tecolote Ranunculus flowers that make up the fields as well as a special nursery, garden and festivals throughout the season. The best time to view the flowers during full bloom is mid-March through mid-April.RELATED: 6 San Diego restaurants on Yelp's 'Top 100' listThe fields are a result of more than 85 years of cultivation that began when an early settler, Luther Gage, settled in the area in the 1920s.Adult tickets are and children ages three through 10 get in for . Click here for more ticket prices and information on the fields. RELATED: AAA's top rated restaurants, hotels in San Diego 847

  

CHICAGO, Ill. -- The IRS says it has issued more than 159 million stimulus payments in just over two months. About 0 billion has been dispersed via direct deposit, paper check and pre-paid debit cards. Yet, even today there are countless eligible Americans who say they’ve fallen through the cracks.In New York state, Hanna Brandow has no idea why she hasn’t gotten a stimulus payment.“My sister and I who both have not gotten the check yet. We did our taxes this year and got our returns already,” said Brandow. “So, it's very strange.”In California, Alexis Lopez is also in limbo.“For most people, it was like 'this person got it, this person got it,' said Lopez. "I was like, ‘well maybe there's some delay with mine.’ No big deal.”And in Ohio, Karen Melroy is also stuck in in stimulus purgatory.“I received my refund by a direct deposit,” said Melroy. “So, there's no reason I can think of why I shouldn't have received one.”All of them say they get the same message when checking on the IRS website.“I normally add a few more expletives to mine when I see it, but it's something to the effect of payment status not available,” said Melroy.It turns out they’re not alone. Those four words: "payment status not available" are exasperating countless Americans who appear otherwise eligible for payments but have not been paid and can’t get answers as to why.“The IRS obviously was very rushed and even when the government takes a year and a half to do a computer system, there are problems with it,” said Robert Probasco, director of the tax clinic at Texas A&M University.In May the IRS added 3,500 telephone representatives to help with problems, but most can only provide general information.“I found this like nine-step guide of how to get a human on the phone at the IRS. I did it twice and hit a dead end,” said Brandow.Because IRS offices remain closed due to the pandemic, the agency tells us that call center agents are working from home. That means they don’t have access to secure personal information specific to each case.“This was designed poorly obviously because it doesn't tell you which of those things happen and if it is a glitch, it doesn't tell you what kind of a glitch,” said Probasco.The IRS is doing a phased reopening at key processing sites and call centers.The IRS tells us some employees have returned to work in Kentucky, Texas and Utah. They say they will follow state and local guidelines as employees return to work in Georgia, Tennessee, Missouri, Michigan and by the end of June in Indiana, Ohio, California, Oregon and Puerto RicoBut if you can’t get your payment issue resolved by the end of the year, you may have to claim your unpaid stimulus assistance on next year’s tax return as a credit.“That doesn't help me today,” said Melroy.That's a sentiment many like Alexis Lopez share as they struggle to rebound financially from the pandemic.“You're left in limbo wondering, 'am I ever going to get this stimulus check that most Americans received?' And I'm in the minority that has not and there's no answers,” she said.The agency says for case-specific information ,the appropriate number to call remains 800-829-1040. Otherwise, you could call your local IRS office and even set up a face-to-face meeting once they reopen. 3281

  

CARLSBAD, Calif. (KGTV) - Community members gathered outside Carlsbad Police Department on Friday, demanding change following a controversial encounter last week between an African American man and Carlsbad officers.“There was zero attempt for de-escalation,” said Yusef Miller with North County Civil Liberties Coalition. “We're asking that all citizens stand with us in solidarity to fight this police brutality," another activist told reporters.The Carlsbad Police Department previously released video which juxtaposed three camera angles of the confrontation with the Marcel Cox-Harshaw -- two from officer body cameras and one from a witness. The footage can be viewed here.The witness' phone shows officers using a Taser on Harshaw and pressing his head into the pavement. The two other videos from police body cameras show officers meeting medics who were called out to a report of a man face down on the side walk. Police say that while medics were evaluating him, he became agitated, yelled profanities and began walking quickly toward them.The department says that officers feared for the medics' safety, so they reached out and told him to stop, but he continued to yell as they tried to cuff him.Officers report that they then used a Taser to try to subdue him after he continued to yell, struggle, turn and pull away.Police report that they then restrained him by holding his head and body to the ground and asking him to calm down while cuffing him, but they say that he refused. The department goes on to say that they put a porous, breathable spit mask bag over his head to protect themselves from coming into contact with droplets from his nose and mouth.Activists dispute the department's account of the night.“They approached him from behind. They grabbed his wrist. They didn't introduce themselves. He wasn't harming anyone. He wasn't armed to our knowledge,” added Miller.Harshaw was taken to the hospital and later released and then cited for resisting arrest. Police believe that drugs or alcohol may have played a role.Police report that a number of factors were considered by officers to use force, including, in part, "The apparent immediacy and severity of the threat to officers or others - Mr. Harshaw charged unarmed fire personnel while yelling profanities."Police also reveal that a Taser can be used, in part, when, "The subject is violent or is physically resisting. Mr. Harshaw was physically resistant and behaved aggressively toward fire personnel."Community members are calling for reforms like a public forum for transparency on arrests, more de-escalation training, and a citizen's review board.Police say the investigation is ongoing and ask anyone who may have seen the incident to give them a call.On Friday, the Carlsbad Police Department sent the following to ABC10 News:“The City of Carlsbad Police Department has been asked to comment on the North County Civil Liberties Coalition Press Conference.”“The Police Department has previously released information about the June 11, incident. That information, including the officers’ interactions, can be found in its entirety here.”“The Police Department understands that ongoing officer training is crucial for effective community policing. To that end and to provide additional information, here is a list of de-escalation related training that has been provided to Carlsbad Police officers.In December of 2015, officers received an 8-hours of Emotional Intelligence Training.In 2017, officers received an 8-hour Crisis Intervention Behavior Health Training.In 2018, Officers received a 2-hour Bias Based Policing Training and will receive the training again in the summer of 2020.In November or 2018, officers received a 2-hour Tactical Communications Training and will received this training again in November of 2020.In December of 2019 and January of 2020, officers received training about changes to the law and the use of force. This was part of AB 392.In December of 2019, the Police Department hosted and had officers attend the first De-Escalation Training offered by the San Diego County District Attorney’s Office. The department assisted the District Attorney’s Office with the creation of the training curriculum.In 2020, the department created, with the assistance of the District Attorney’s Office, an 8-hour in-house De-Escalation Course. This training will be attended by all officers.Additionally, here are links to three Carlsbad Police Department news articles that relate to the subject of de-escalation.· San Diego County Police Chiefs’ and Sheriff’s Association Adopts Crisis Management and De-escalation Philosophy · Police Support #8cantwait · Police Halt Use of Carotid Hold 4705

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